Get gradients of both lift and drag

Ry10 · January 6, 2016, 18:59

I need the adjoint gradients of both drag and lift. I can get the drag gradient or lift gradient by changing OBJECTIVE_FUNCTION= DRAG or OBJECTIVE_FUNCTION= LIFT in the config file. What can I do to get the gradients of both? Whatever I try I get the error: OBJECTIVE_FUNCTION: multiple values for type enum.

talbring · January 7, 2016, 10:03

Hi Ry10,

like you already noticed, it is not possible to get both gradients at once. You have to do two separate runs. One with OBJECTIVE_FUNCTION=DRAG and one with OBJECTIVE_FUNCTION=LIFT.

January 6, 2016, 18:59	Get gradients of both lift and drag	#1
Ry10 New Member Ryan Barrett Join Date: May 2015 Posts: 15 Rep Power: 11	I need the adjoint gradients of both drag and lift. I can get the drag gradient or lift gradient by changing OBJECTIVE_FUNCTION= DRAG or OBJECTIVE_FUNCTION= LIFT in the config file. What can I do to get the gradients of both? Whatever I try I get the error: OBJECTIVE_FUNCTION: multiple values for type enum.

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January 7, 2016, 10:03		#2
talbring Super Moderator Tim Albring Join Date: Sep 2015 Posts: 195 Rep Power: 11	Hi Ry10, like you already noticed, it is not possible to get both gradients at once. You have to do two separate runs. One with OBJECTIVE_FUNCTION=DRAG and one with OBJECTIVE_FUNCTION=LIFT.